Control Circuit; Control Power Source Function Block - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

[ IX Troubleshooting ]
[THMU-A]
-7- Control Circuit (THMU-A)

(1) Control power source function block

Noise filter
Noise filter
TB1
AC 208 / 230 V
Terminal block for
Fuse
power source
Surge protection
Control board
72C
Solenoid valve
4-way valve
CH11 Relay, LEV
Drive circuit
LEV
12V Power supply
TB7
Terminal block for
transmission line
CN40
for centralized control
(DC 24 ~ 30 V)
TB3
Indoor/heat source
transmission block
(DC 24 ~ 30 V)
M-NET
transmission line
(Non-polar 2 wire)
TB2
AC Power source
AC 208 / 230 V
Terminal block for
power source
TB15
Terminal block
for MA remote
TB5
To next unit
controller
(Indoor unit)
Terminal block
for transmission
line connection
DC 17 ~ 30 V
A, B
DC 17 ~ 30 V
A, B
DC 9 ~ 12 V
* MA remote controllers and M-NET remote controllers cannot be used together.
(Both the M-NET and MA remote controller can be connected to a system with a system controller.)
HWE09080
INV board
Rectifier DCL
72C
17V Power supply
5 V Power supply
Smoothing capacitor
Fuse Inverter reset
circuit
63H1
Microcomputer 18 V Power supply
5 V Power supply
DC / DC converter
M-NET board
Detection circuit for
the power supply to
the transmission line
Relay drive circuit
Relay
Indoor unit
M-NET remote
controller
MA remote
controller
- 339 -
Power source system (AC 208 / 230 V)
Control system (DC 5 ~ 30 V)
Smoothing capacitor Inverter Compressor
Inverter drive
circuit
Microcomputer
Fuse
DC / DC
converter
30 V Power supply
GB